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M. GARSIDE.

h MEANS FOR SEOURING GOREDGASTINGS TO OTHER PARTS. No. 307,714. Patented Nov. 4, 1884.

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MELVIN GARSIDE, OF JERSEY CITY, NEW? JERSEY, ASSIGNOR OF ONE-THIRD TO HENRY I3. IVHEATCROET, OF NEIV YORK, N. Y.

MEANS FUR SEGURlNG CORED CASTlNQ-ES TO OTHER PARTS.

- SPECIFICATIQIQ' forming part of Letters Patent No. $07,714:, dated November t, 1884-.

Application filed February 28, 188 1. (X model.)

To all whom it hwy concern: Figure l is a sectional view of a pulley se- Be it known that I, MELVIN GARSIDE, a cured to the shaft according to my invention. citizen of the United States, and a resident of Figs. 2 and 3 are fragmentary sectional views Jersey City, Hudson county, New Jersey, have of the boss or hub of the pulley. Fig. 4 illus- 5 invented an Improved Means for Securing trates the application of my invention to the Cored ()astings to other Parts, of which the cross-piece ofalaznp-post.andshows the means following is aspecitication. tbrattaching separate pieces exteriorly, as will My invention relates to means whereby a be fully set forth hereinafter. casting, hollowed or cored out, may be secured Referring, first, to Figs. 1, 2, and 3, A is an IQ to another part by means of a set-screw withordinary shaft, and B aeast-iron pulley mountout the necessity of drilling and tapping the ed thereon. The hub of this pulley is cored cast metal as is usually done. My object is to out inside in the usual way, and bored to fit avoid this drilling and tapping, partly for the the shaft. In order to secure the pulley to the sake of economy, partly because it is someshaft, I core out in casting it a nut-recess, a,

15 times very diliicult to get at the part with a (seen best in Figs. 2 and 3,) and a screw-hole, drill or tap, and partly because some of the I), which extends through the metal of the hub inferior qualities ot'cast-iron which are otherfrom the recess a to the outside, as clearly wisegood enough will notstand tapping. The shown. These being cast in the hub, little or ordinary method of securing a cast-iron pulno expense is incurred. In securing the pul- 2o lcy to a shalt. for example, is to core out the ley on the shaft it is now only necessary to boss or hub, bore it to fit the shaft, drill radifirst place the nut d in the recess a, then pass ally through the hub, and then tap the hole the shal't through. and then insert the set-screw thus drilled. In such cases the pulley-rim is 0 until it properly engages the nut d. Now, usually in the way, and it is frequently necesby turning the screw it passes through the nut sary to employ special machinery to drill and (which cannot turn, being embraced by the 7 tap for the set-screw. In my construction I walls of the recess) and impinges on the shaft.

avoid this drilling and tapping by coring out The not is now caused to press against the within the hollow or bore ofthe hub a square root of the recess a. which provides the necesor polygonal recess to receive a nut, and I also sary resistance. Thus I avoid the drilling and 0 core out an opening to receive a set-screw, extapping of the hub, as will be well understood. 8o

tending from said nut'recess to the outside of Fig. t illustrates a means for attaching the the hub. In securing the pulley to the shaft cross-bar to the top of a lamp-post, and the it is only necessary then to place the nut in its attachment to said bar of the rods which suprecess and insert the set-screw from the outport the lamp. A represents the post, and B side. "'Thcscrcwengagesthenut, and the pressthe crossbar, which has a hole or aperture urc of its tip or point on the shaft causes the cored out in it to receive the post. To this nut to press against the roof of its recess as a bar are secured the rods 9, which support the resistance. The nut sets back in the recess lamp. This differs from the application first far enough to lcavea free passage-way for the described, in that the set'screws e serve not 40 shaft. In other applications of my invention only to secure the bar B to the post, but also 0 the screw may act to secure the casting to the to secure the rods 9. to the said bar. It is necshaft or other part that passes through the castessary in this construction to provide nuts 71 7!, ing, and may also serve as a bolt to secure a on the set-screws, which are screwed down piece exteriorly to the castin In this case upon the rods 9, so as to hold them firmly to 45 the set-screw passes also through the piece to the bar 13. be secured exteriorly, and a nut 011 the set- In this application I am enabled to employ screw is screwed down on said piece to hold it inferior iron for the bar 13, as there are no lirmly in place. screws formed in it, whereas in the usual metlr In the drawings I have shown several ap 0d, where the crossbar is drilled and tapped, 50 plications of my invention. it must not only be of better iron than that IOO usually employed for the post, but the expense or less closely in the cored and cast parts, as

in the examples shown. It is only necessary that the recess to receive the nut shall be of such a form as to prevent the nut from turning, and be deep enough to prevent it from projecting into the interior opening.

I may employ any number of set-screws in the pulley-hub. Indeed, as it costs almost nothing to provide for them in casting the pulley, I may provide for any number, and the user may employ as many screws as he thinks will be needed. In the case of cast set-eollars, the drilling and tapping for the set'screws is the greater part of the cost of making them. This expense I avoid entirely by my construction. In forming 'the recess a for the nut in the pulley-hub, set-collar, or similar thing, it is sometimes convenient to cast an annular recess in the hub as wide as the nut, and arrange all of the screw-holes b, if more than one, to enter this. This annular recess might be turned out in boring the pulleyhub, but it is as well to core it out.

I am aware that it is not new to east wroughtiron nuts in east-iron articles, but this method [has serious practical objections well understood by those skilled in the art.

It is very difficult to set the nut accurately in the mold, and the union between the east and wrought metal is apt to be imperfect. If the nut-thread becomes worn, the nut cannot be replaced.

Myremovable nut has the same advantages that the above has over the drilling and tapping of the cast metal, and the additional advantages that 110 new drilling and tapping is required in case the thread of the nut becomes worn. The user has only to substitute another nut, and thus avoid material loss of time.

It will. be observed that I may employ setscrews and nuts varying somewhat in size. This is an advantage in case the thread should strip or wear, as it is not always convenient to duplicate the parts.

As set-screws are provided with threads to fit ordinary nuts, if the nut should be worn another ordinary nut may be readily substituted. I would also say that I am well aware that it is not new merely to cast recesses and apertures in castings to receive the shanks and heads of bolts. This I do not claim.

Having thus described my invention, I claim- As a means for securing a hollow casting, as a pulley-boss, to another part, as a shaft, the said boss provided with a nut-recess, a, and a'cored screw-hole, b, in combination with a nut and set-screw, all constructed and arranged substantially as set forth.

In witness whereof I have hereunto signed my name 'in the presence of two subscribing witnesses.

MELvIN GARSIDE.

Witnesses:

HENRY Oonnn'rr, ARTHUR C. FRASER. 

